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CHAPT�R 1 ' <br /> REINFORCING BARS AND SPIR�4LS (Cont.) <br /> IDENTIFICATION MARKS*- ASTM STANDARD BARS <br /> The ASTM specifications for billet steel. riil steel, The grade mark for Grade 60 and the minimum <br /> axle steel and low alloy steel reinforcing bars (A615, yield designation for A706 may be either the number 60 <br /> A616, A6ll and A706) require identification marks to or one (1) single iine. <br /> be rolled into the surface of one side u! lhe bar to denote A grede mark or rt�inimum yield designation Im? is <br /> the producer's mill d=signation, ba� s•:e and rype of s��aller and between the two main nbs which are on <br /> steel. Aiso required is a grade mark fi ��raue GC and a �Dposite sides of all U.S. made tars. When a number is <br /> mark indicating mmimum yield strength for 4706. used for the grada mark or minimurn yield designation, it <br /> Grade 40 and Gr�ide 50 bar•; show only tn.�e marks (no is 4th in order. <br /> grade or minimum yielc� s'rength mari.) in t�e following <br /> order: <br /> Ist — Producing A�ill (usually a letter) <br /> 2nd — Bar Size Number (#3 through # 18) <br /> 3rd — Type Steel� {�} }or New Billet (S tor Supptementary Requ�rements A6151 <br /> � for Axle <br /> = tor Rail <br /> W tor Low Atloy <br /> lAain Fi�s `dam FiGe�_ <br /> � <br /> � — Letter or i, I letter u� � H <br /> Symoo�lor � Srmooi�or i �� <br /> f .� Pmaucmg tJ�u �'�� Une P�,:�,,:mg V.�i <br /> Bar S�ce � �" Bar S�te I I <br /> i l�ne <br /> �� MIl � �� +�11 � . <br /> � � � <br /> I i � . i <br /> Type Steel <br /> TrPe Steei <br /> 'f i (New BJletl f �� ' I �raCr!.�aew p tNew Bd�etl � �r.��e `ddr� ;;r <br /> �� 1..5..per SU F__ rdm�mum r�eia � .5.. per 54 ',����'������� �"�� <br /> � Deagnetmn 6 [:••tiig��a��un <br /> � � <br /> Grade 40 Grade 60 Grade 60 <br /> Grade 50 and A706 and A706 <br /> VARIATIONS: Bar identificalion marks may also be orientcd to read honzontalty (at 90' to those <br /> illustratecl above). <br /> Grade mark and minimum yield designation lines must be continued at least 5 deformaUon spaces. <br /> Grade mark and minimum yield designation numbers may be placed within separate consecutive defor- <br /> maUon spaces to read vertically or honzontally. <br /> IDENTIFICATION OF REINFORCING BARS MEETING A615-79 AND SUPPLEMENT S1 <br /> As indicated above A615 reintorcing bars furnish• CRSI RECOMMENDATION <br /> ed to the supplementary requirement (S1) must be ��To avoid confusion among purchasers, CRSI <br /> designated for type of steel by the symbol "S" instead strongly recommends that all producers of reinforcing <br /> of the traditional "N". The a�ternate marking require- bars for use under ACI Building Code, AASHTO, and <br /> ments for type of steel could cause confusion, mis- Federal specification requirements, and which meet <br /> understandings, project delays, etc. ASTM A615-79 and Supplement S1, identify these bars <br /> by the mark "S" as soon as possible." <br /> 'See Appendix A for complete identification marks of concrete reinforcing bars produced by all U.S. <br /> manufr^turers. The marks, listed alphabetically by producing mill, include the identification require- <br /> ments of ASTM and the deformation pattern used by each mill. <br /> 1•3 <br />